From the road, the close to 400 white industrial boxes packed into 1.5 acres of barren land in Ontario, California, a little more than 40 miles from downtown Los Angeles, look like standard electrical equipment. They’re surrounded by a metal fence, stand on concrete pads and sit under long electrical lines. US advances on clean energy with first offshore wind farm Read more But take a closer look and you’ll notice the bright red coloring and gray logo of electric car company Tesla on the sides. And inside the boxes are thousands of battery cells – the same ones that are used in Tesla’s electric cars – made by the company in its massive $5bn Tesla Gigafactory outside of Reno, Nevada.

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